Question

7.
An alloy of gold and copper weighing 100 gm contains 97 gm of
gold. How much gold should be added to the alloy to increase the
percentage of gold to 98 ?
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

50grams must be added to the alloy.

Step-by-step explanation:

gold : copper = 97 : 3. (*2)

required ratio = 98 : 2. (*3)

194:6

294:6

increased unit = 100

200units= 100grams

1unit= 1/2

100units= 50grams.